A colleague of mine (office job) confided in me that while working overtime on a clusterf*** sort of a day, her thong was giving her the most grief. She was stuck in briefings when she wasn't speed-walking between departments in her pants suit, and moments to adjust her underwear were few and far between. She tried adjusting throughout the day, but the thong was simply too small or the wrong fit, so she got proper sore back there. I know she still wears them from time to time, though.
Side-note; I was surprised that she'd share something like that, considering we're colleagues and friends by proxy only. I don't remember why thongs came up, but I think the fact that I appeared neutral to the topic and asked questions from a place of concern and very mild curiosity, rather than being openly interested, made it seem like work-appropriate talk.
And a final tangent! I've noticed something through conversation with girlfriends/flings, and a random google search will also back this up. A lot people don't seem to know that thongs need to be the right fit, and simply give up once they try a few that give them the permanent wedgie feeling. Thongs are something you have to know how to wear, strange as it sounds.